Biomedical subjects

G H Roberson

Publications and source records attributed to G H Roberson.

At least 55 records · Page 3Linked to original sources

PubMed1976

Correlation between the appearances of the ventricular system at carotid angiography and computer assisted axial tomography.

Computer assisted axial tomography and the venous phase of carotid angiography provide complementary assessments of the ventricular and paraventricular structures. The computer assisted tomography more readily defines the ventricular system, but can prove weak in differentiating paraventricular gliomas, solitary metastasis and infarcts. Angiography plays a major role in differentiating between these three conditions, but is poor in accurately localizing and identifying intra- and paraventricular hemorrhage which is characteristically and expeditiously uncovered by C.T. scanning.

Brain Neoplasms↗

PubMed1976

Radiology of suprasellar ectopic pinealoma.

The radiographic and clinical findings in twenty-three recently reported cases of suprasellar ectopic pinealoma are reviewed and three previously unreported cases are described. It is concluded that suprasellar calcification is extremely rare; enlargement of the sella turcica was present in approximately 20 to 30 per cent, none demonstrated elevation of the anterior cerebral artery. Pneumography may show a smooth or irregular filling defect in the anterior part of the third ventricle. In one of the new cases there was an isotope uptake in the suprasellar region. The differential diagnosis and other clinical data are also discussed.

Adolescent↗

PubMed1976

Embolic occlusion of the superior and inferior divisions of the middle cerebral artery with angiographic-clinical correlation.

Clinicians, in defining cerebral vascular syndromes, recognize embolism to the superior and inferior divisions of the middle cerebral artery in addition to embolism of the individual branches. In the present study 14 examples of arteriographically visualized divisional occlusion are analyzed, and a good correlation is demonstrated between the roentgenologic and clinical findings.

Cerebral Angiography↗

PubMed1976

Some limitations of computed tomography in the diagnosis of neurological diseases.

Some of the limitations of CT in the diagnosis of neurologic disease are reported. Problem areas include small lesions; lesions obscured by adjoining structures; small vascular structures and detail of large vessels; cases in which the diagnosis is made but information is incomplete for treatment; cases of incorrect diagnosis; non-nenoplastic lesions mistaken for neoplasms; some subdural hematomas; occasional false negative findings; and misinterpretation due to technical errors. Knowledge and use of the clinical presentation, the performance of other complementary diagnostic procedures, repeat CT scans tailored to the region of interest, and repeat serial scans may assist in reaching the proper diagnosis and diminishing potential error.

Computers↗

PubMed1976

Computed tomographic evaluation of hemorrhage secondary to intracranial aneurysm.

Angiography in patients with subarachnoid hemorrhage secondary to aneurysm gives precise information on the location and size of the aneurysm and the aneurysm and the presence of spasm but gives incomplete information on ventricular size, size and location of hematoma, and extent of infarction. CT demonstrates precisely brain or intraventricular hematoma and, at times, subarachnoid hemorrhage, indicates the extent of infarction; and rapidly documents the degree of hydrocephalus. Infarction secondary to spasm, hematoma, and hydrocephalus are readily differentiated. The CT examination may be repeated as often as necessary without patient discomfort or morbidity. Serial scans allow rapid assessment of change in ventricular size, development and persistence of infarction, and change in size of hematoma.

Adult↗

PubMed1976

Sphenoethmoidal mucocele: radiographic diagnosis.

Fourteen cases of mucocele of the sphenoid sinus are reviewed to assess differentiating radiographic features. Recognition is usually possible using detailed tomography in the frontal, lateral, and submentovertex projections. Two constant findings were opacification of the sinus (usually bilateral) and expansion and thinning of the sinus walls. Contiguous opacification of the ethmoid sinuses was present in most cases, and pansinusitis was frequent. Distinction from intrasellar lesions is based on the absence of sellar enlargement. Early and correct diagnosis is important to prevent permanent visual loss and to assure appropriate surgical approach.

Adolescent↗

PubMed1976

Metrizamide cisternography with hypocycloidal tomography: preliminary results.

Metrizamide (Amipaque), a nonionic water soluble contrast agent, has been shown to be safe and efficacious for lumbar myelography. Clinical trials of cervical, thoracic, and even intracranial examinations have produced good results. Despite an inherent neurotoxicity, significant complications have been quite rare, and patient tolerance in general is remarkably good. Preliminary results of metrizamide cisternograms using hypocycloidal tomography are presented to illustrate the anatomic detail which can be demonstrated using this technique.

Humans↗

PubMed1976

Evaluation of intracranial aneurysms by computed tomography.

Useful information has been gained by review of eight cases of intracranial aneurysm demonstrated by computed tomography (CT) and correlation with cerebral angiograms. The angiograms demonstrated one or multiple aneurysms, the precise location of the aneurysm, and presence of arterial spasm. The CT scan can delineate the full size of the aneurysm when the sac has been partially obliterated by thrombus, the presence of hematoma, infarction, hydrocephalus, and intraventricular and subarachnoid hemorrhage. These associated features are more difficult to evaluate by angiography alone.

Adolescent↗

PubMed1976

Theoretical considerations in the use of contrast media for computed cranial tomography.

The impressive results obtained by the use of iodinated contrast media, particularly when administered by drip infusion technique, led us to investigate the advantages and disadvantages of the method. An originally non-invasive examination has progressively evolved into a quasiinvasive examination in the majority of cases, and our results appear to justify such a trend.

Aged↗

PubMed1976

CSF enhancement for computerized tomography.

Metrizamide cisternography, combined with hypocycloidal tomography, has been performed in 12 patients with possible posterior fossa or parasellar mass lesions with finely detailed images of the basal cisterns resulting. Computed tomography was performed in nine of these patients and produced exceptional images of the cisternal anatomy. The technique of cerebrospinal fluid enhancement may be efficacious in identifying small basal masses not shown with conventional computed tomography, and thus may form an important complement to enhancement by intravenous injection of contrast medium.

Brain Neoplasms↗

PubMed1975

Surgical treatment of extracranial carotid occlusive disease.

This report has reviewed the preoperative evaluation, operative technique, postoperative care, results, and representative pathological findings in 225 carotid endarterectomies. Surgery is generally indicated in patients with: 1. TIA's, and carotid stenosis (lumen diameter less than 2 mm.) or an ulcerated plaque. 2. A stable, mild to moderate neurological deficit with or without TIA's, and carotid stenosis (lumen diameter less than 2 mm.) or an ulcerated plaque. 3. An acute progressive or fluctuating neurological deficit, and carotid stenosis (lumen diameter less than 2 mm.) or carotid occlusion. Surgery should be considered in some patients with: 1. TIA's, and ipsilateral carotid occlusion. 2. An acute partial persistent neurological deficit, and carotid stenosis (lumen diameter less than 2 mm.) or occlusion. 3. No symptoms, and carotid stenosis (lumen diameter less than 2 mm.). Surgery is generally not indicated in patients with an acute severe persistent neurological deficit, and carotid stenosis or occlusion.

Aged↗

PubMed1975

Stroke in a 15-year-old girl secondary to terminal carotid dissection.

A 15-year-old girl died 14 days after hemiplegia suddenly developed. On arteriography, intimal separation of the middle cerebral arteries showed as a long attenuated column of dye--the "string" sign. Pathologic examination showed intimal separation starting at the distal bifurcation of the right internal carotid artery and extending into the middle and anterior cerebral arteries. The arteriographic string sign as evidence of dissection may aid diagnosis of this cause of childhood hemiplegia.

Adolescent↗

PubMed1975

Cerebral infarction diagnosis by computerized tomography. Analysis and evaluation of findings.

CT has been found to be of value in cerbrovascular disease. In acute infarcts, the CT (before anticoagulation) excludes intracerebral hemorrhage. The CT may not exclude small petechial hemorrhagic infarctions (with negative cerebrospinal fluid). Angiography, otherwise, is more informative, disclosing ulcerative, irregular plaques, senosis, emboli, etc. In old infarcts, the CT may differentiate an old infarct from a tumor in a patient with focal seizures. Angiography and radionuclide scans are less informative. CT is a valuable investigative agent for clinico-anatomic correlation in cerebrovascular disease.

Adult↗

PubMed1974